1.56 Semi-Finished Photochromic Single Vision Lens
Product Specification
Material |
Resin |
Index |
1.56 |
Vision Effect |
Single vision & photochromic |
Base Curve |
0,2,4,6,8,10 |
Abbe Value |
38 |
Specific Gravity |
1.28 |
Diameter |
70mm |
Transmission |
99% |
Coating Choice |
HC/HMC/SHMC |
Coating Color |
Blue coating & green coating |
Product Description
What are semi-finished lenses?Semi-finished lenses, also known as SF lenses or lens blanks, are optical lenses with a pre-molded front surface and an unpolished back surface. They are the raw material used to make the most personalized RX lenses according to the patient's prescription.
Why are semi-finished lenses so important to modern lenses manufacturing?Image that if an optical lab had to keep every possible combination of lens material, design, and prescription in stock as a "finished" lens, their inventory would be massive and the costs would be extraordinarily high. Semi-finished lenses can help the company reduce finished stock.
By stocking a small range of semi-finished blanks, optical labs can efficiently process orders for different prescriptions. Upon receiving an order, they can select suitable semi-finished blanks and carry out precise grinding and polishing on the back surface. Thus, greatly reduces storage costs and streamlines inventory management.
Product Advantages
Customization: Each person's spectacle prescription is unique and usually involves the sphere (which corrects nearsightedness or farsightedness), the cylinder (which corrects astigmatism), and the axis (which indicates the direction of the astigmatism). With a SF lens, you can customize the back lens surface, accommodating unique vision needs and various frame styles.
Outstanding Color Performance: Light adaptation is a defining feature of this semi-finished lens. The photochromic molecules are uniformly distributed in the lens materials. They change fast from clear to dark under sunlight, like closing the blinds in front of the window on a sunny day. They are commonly used as sunglasses, allowing for easy transitions from clear indoor lenses to dark-tinted outdoor lenses, and vice versa.
